PublicationPersonal and social responsibility development in volleyball players through a hybrid Positive Youth Development program: A mixed methods approach(2021-02) Muñoz Llerena, Antonio; Caballero Blanco, Pablo Jesús; García de Alcaraz, A.; Hernández, ElenaPositive Youth Development (PYD) programs are being utilized to foster a holistic growth in children and adolescents. Special relevance has acquired in the last few years the hybridized application of two or more of this type of programs. Although their application is common in the school context, there are few research studies that attempt their implementation in an extracurricular context. The purpose of this study was to analyze the effects of an intervention, based on a hybrid PYD program, on personal and social responsibility in youth volleyball players in an extracurricular context. A hybrid program was applied during the competitive season, with a total of 37 sessions to 30 female students (15 experimental, 15 control) between 8 and 10 years old (M = 8.87, SD = 0.82). A convergent mixed methods design was applied to integrate: a) semi-structured interviews and field notes, and b) Personal and Social Responsibility Questionnaires. The results showed that the implementation of the hybrid program seems to present a positive perception of learning in both participants and coach. Although there were no statistical significant differences neither intergroup nor intragroup, the findings suggest that the hybrid program seems to be effective to foster personal and social responsibility in youth female volleyball players. PublicationValoración de la carga interna de trabajo: RMSSD-SLOPE(Universidad Pablo de Olavide, 2019) Naranjo Orellana, José; Ruso Álvarez, José Francisco; Nieto Jiménez, ClaudioSe trata de una aplicación para facilitar el cálculo de la carga interna de trabajo a partir de una medición sencilla de variabilidad de la frecuencia cardiaca. Es el resultado de varios años de investigación y se pone a disposición de la comunidad de ciencias del deporte. PublicationValidity and reliability of Omegawave® device to measure RR intervals at rest(Universidad Pablo de Olavide, 2019) Naranjo Orellana, José; Ruso Álvarez, José Francisco; Rojo Álvarez, José LuisObjective The aim of this study was to validate the measurements of the RR intervals taken at rest by the Omegawave® device (OWD) by comparing them to the measurements simultaneously made by an ECG, considered to be our gold standard. Methods Five rest measurements were made for 10 minutes on five different days to 10 men and three women participated in this study (24.8 ± 5.05 years; 71.82 ± 11.02 kg; 174.35 ± 9.13 cm). RR intervals were simultaneously recorded using OWD and ECG The processing of ECG signals (digitised at 43 samples per second) included the detrending of baseline noise and a high-pass filtering for emphasizing the QRS complexes and attenuating the T waves, often prominent in sport populations. After obtaining the gold-standard beat times from the ECG, the beat times from the OWD were automatically aligned to them and compared to check whether both measurements could be considered superimposable. A Bland-Altman analysis was applied to the complete time series of each subject and it was repeated for the five measurements made for all subjects. Results The results suggest that the RR interval measurements performed by the OWD have very strong agreement with those made with an ECG. Deviations not exceeding 25 ms could be expected in 95% of the cases and this is within manageable ranges both for clinical practice and sports. Conclusions To conclude, RR intervals measured by the OWD can be considered highly consistent with those obtained from the gold standard (ECG).